Baby hungry and other myths

Since the birth of my 5th child, I have never felt the urge to have another baby. If someone wanted to hand me a 1 year old boy---I'd be happy to take them off their hands for eternity, but to actually have another baby, go through the first year of dependence...No, Thank You. My son often asks why I "won't " have any more babies (he's dying for a brother), I tell him it's because we can't. He is way too young to understand what has occured in his parents lives to get to this point....so I just say "We can't. We're all done". It seems to pacify him. For the moment. There are a lot of moments in my life right now, when I'm so tired of teaching the same thing for the last almost 15 years...and still have to go through it. I have learned the things that will pass---and don't feel I need to call my pediatrician every hour if my child has a fever. I don't feel like I've failed miserably if my 6 year old gets into things I've told is a "NO-NO" for the last 6 years. I do question it at times, now that my teens have arrived. What I find the most comical, is when one of the "oh-so-knowing" teens try to correct me, remind me, or step in as a parent to my other children. I gently remind them that they too, at that age, were equally annoying. J is the funniest, because she just can't believe it. I cannot wait, as my mother has, for the day that my daughters come and apologize and need my advice on their OWN teenagers.
Did I just say that? Sounded a bit like my own mother for a second.....